GB438092A - Improvements relating to arrangements for preventing unauthorised use of motor vehicles - Google Patents

Abstract

438,092. Preventing unauthorized use. RAIMANN, A., 6, Wenhartgasse, Vienna. Nov. 27, 1934, No. 34077. Convention date, Nov. 27, 1933. [Class 7 (ii)] [See also Groups XXXVII and XXIX] A valve controlling the fuel supply to the engine of a motor vehicle is controlled by an electromagnet, the energizing circuit of which is controlled by a switch with a combination lock. The electromagnetically-operated valve comprises an electromagnet w with a hollow core b connected to a core flange c by a non- magnetic sleeve i and adapted to attract an armature d which itself attracts a ball g so as to allow the fuel to pass round the ball and through the hollow armature d and core e. A spring f returns the parts when the magnet w is de-energized. The switch comprises a rotary shaft r carrying a sector s which is prevented from rotating by two balls p engaging recesses t in the sector s. To unlock the switch, four discs u must be rotated by handles w through predetermined positions, after the manner of a combination lock, until recesses v in the discs u are in a position to receive the balls p. The switch has three positions. In position I the ignition is earthed, by a button 3 on the sector s engaging a contact spring 2, and a circuit 8 to the horn and head-lights is open because a contact connected to the circuit 8 is out of engagement with a spring contact 6. The handle H connected to the shaft r also lies over a screw 17 which secures a cover to the switch casing, so that the cover cannot be removed when the switch is in this position. In position II which can only be obtained after the combination has been moved into unlocking position, the button 3 disengages the spring 2 so that the ignition becomes operative and the spring contact 6 is pressed by a button into engagement with the contact associated with the circuit 8, thus closing the horn and head-light circuit. In position III the button presses the spring contact 6 also into engagement with a contact 10 connected to a conductor m leading to the electromagnet w controlling the fuel supply to the engine. This is the position for normal driving.